I have always heard that mucus in the stool is no big deal. As for the streaks that MIGHT be blood . . . you did the right thing going to the doctor . . . because it could be various things and it will take an exam to figure out exactly what. Most of the time it is something simple. We just worry like heck until we know for sure. Attempt to keep your mind on other things (I know, believe me, I know that's not easy).